Means of automatically removing ferrous and other particles from liquid



Jan. 18, 1949. A. SCRIVENER 2,459,343

MEANS OF AUTOMATICALLY REMOVING FERROUS AND OTHER PARTICLES FROM LIQUIDFiled Sept. 14, 1944 Patented Jan. 18, 1949 MEANS OF AUTOMATICALLYREMOVING FERROUS AND OTHER PARTICLES FROM LIQUID Arthur Scrivener,Birmingham, England Application September 14, 1944, Serial No 554,120 vIn Great Britain April 25, 1944 This invention has reference to improvedmeans of automatically removing ferrous and other particles from liquid,the said means being primarily intended to constitute a self-containedassembly unit particularly adapted for use in connection with metalcutting and grinding machines.

In mechanisms of this kind it is a recognised practice to provide asupply of cooling liquid to the cutting edge and work face from areservoir, which supply of liquid may be circulated by a pump or othermeans to ensure a continuous flow during the working period of themachine. In the progress of such cutting or grinding operations fineparticles of the metal removed by the cutting or grinding edge or facebecome introduced into the liquid stream and enter the reservoir fromwhich the supply is obtained and circulated, and it will be obvious thatit is a marked desideratum that means should be provided for removingany ferrous or other particles so introduced into the liquid and whicheventually reach the reservoir and tend to choke or foul the liquidwhich is being circulated to the supply line.

The present invention consists of improved means of automaticallyremoving ferrous and other particles from liquid, characterised by arotatable magnetic member located in a restricted channel connected tothe liquid reservoir from which it is desired to extract ferrous andother extraneous adherent particles; and in means for removing the saidparticles from the rotatable member, the whole constituting aself-contained assembly unit particularly adapted for use in connectionwith metal cutting and grinding mechanisms.

The invention will now be described according to two applicationsthereof with particular reference to the accompanying sheet of drawings,in which:

Fig. l is a diagrammatic front elevation of one practical application ofthe invention utilising a rotatable disc carrying a plurality ofmagnets.

Fig. 2 is an end View looking in the direction of the arrow Fig. 1.

Fig. 3 is a plan of Fig. 1.

Fig. 4 illustrates a modified means of carrying and of traversing themagnets.

Referring first to the illustration covered by Figs. 1, 2, and 3 of thedrawings, the apparatus is intended for use as a self-contained assemblyfor attachment to a metal cutting machine. There is provided a disc :1having inset therein a plurality of cylindrical permanent magnets b. Thedisc is adapted to be positively rotated 1 Claim. (Cl. 2101.5)

through worm reduction gear c from the shaft (1 of an electric motor orother power unit. The disc a is rotatable with a horizontal spindle econnected to the worm reduction gearing and the lower section of thedisc 11 is disposed within the cooling liquid flowing through a channelrestriction g forming a part of the liquid container g or sump fromwhich the cooling liquid may be supplied, directed and delivered againstthe tool cutting edge and work face. The rotatable disc a is associatedat a point above the liquid level with non-magnetic scrapers or wipers hwhich have contact with the surfaces of the disc a on either sidethereof and therefore with the ends of the magnets b which ends arelocated in the same planes as the side faces of the disc. These scrapersor wipers serve to remove any ferrous or other adherent particles whichmay have been extracted from the liquid by the magnetic action of therotating disc; the removed particles are directed by gravity along thedownwardly inclined faces of the scrapers or wipers h into a deliverychute or waste container The scrapers or wipers may be formed as seen inFigs. 2 and 3 of angle or channel section to constitute a trough.

In the modification shown in Fig. 4 the permanent magnets b are carriedon a continuous chain is which is mounted about a series of sprocketwheels I which determine the path of the chain. At one part of itstraverse the chain with the associated permanent magnets passes throughthe restricted channel g feeding the coolant liquid into the receptacleg, and the magnetised particles are extracted from the liquid andcarried by the chain transmission to the scrapers or wipers h whichserve to remove the ferrous or adherent particles from the faces of themagnets into the delivery chute or waste container 7'.

It is intended that the mechanism forming the subject of the presentinvention shall form a complete unit for attachment to and use inconnection with a metal cutting or grinding machine used in connectionwith ferrous metals, and that its operation shall be continuous and insynchrony with the operation of the metal cutting machine so that at alltimes when the machine is functioning the device for extracting theferrous and other adherent particles is also functioning so as to ensurethe maintenance of the supply of cooling liquid in a clear orsubstantially clear condition for circulation and redistribution.

By disposing the rotatable disc within a restricted channel such as gthrough which the cooling liquid is caused to flow in its passage to orfrom the supply reservoir or container it is ensured that the whole ofthe cooling liquid is in turn continuously submitted to the particle,

extracting action of the disc so that the supply of liquid can bereasonably maintained in a clear Filters or sieves may be introduced atpoints in the flow line of the liquid to remove non-magnetic particlestherefrom.

I claim:

A device of the class described comprising, in

combination, a rotatable disk, means for driving said disk continuouslyin one direction, a conduit for carrying in contact with a portion ofsaid disk a stream of liquid containing magnetizable particles,magnetized rods extending transversely their'ends on the other side ofthe disk substantially in a single plane, and scrapers for removingparticles from the ends of the rods after they emerge from the stream ofliquid. I

ARTHUR SCRIVENEB.

REFERENCES CITED The following references are of record in the file ofthis-patent; I l 1 UNITED STATES PATENTS Number Name Date 453,317Townsend June 2,1891 466,515 Reed Jan. 5,1892 468,540 Cane Feb. 9, 1892529,188 Pike Nov. 13, 1894 687,053 McKnight Nov. 19, 1901 1,136,215Dings et al Apr. 20,1915 1,681,232 Hall Aug; 21, 1928 2,188,516 PayneJan; 30, 1940 2,191,962 Jones Feb. 27, 1940 2,272,719

Maynard, Feb; 10, 1942

